145 lines
4.7 KiB
C++
145 lines
4.7 KiB
C++
// benchmark based on: http://cpp-next.com/archive/2010/10/howards-stl-move-semantics-benchmark/
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//
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// @file bench_static_vector.cpp
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// @date Aug 14, 2011
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// @author Andrew Hundt <ATHundt@gmail.com>
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//
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// (C) Copyright 2011-2013 Andrew Hundt <ATHundt@gmail.com>
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// (C) Copyright 2013-2013 Ion Gaztanaga
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// @brief varray_benchmark.cpp compares the performance of boost::container::varray to boost::container::vector
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#include "varray.hpp"
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#include "boost/container/vector.hpp"
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#include "boost/container/static_vector.hpp"
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#include "../test/movable_int.hpp"
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#include <vector>
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#include <iostream>
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#include <boost/timer/timer.hpp>
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#include <algorithm>
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#include <exception>
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using boost::timer::cpu_timer;
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using boost::timer::cpu_times;
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using boost::timer::nanosecond_type;
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static const std::size_t N = 500;
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#ifdef NDEBUG
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static const std::size_t Iter = 50;
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#else
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static const std::size_t Iter = 5;
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#endif
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//#define BENCH_SIMPLE_CONSTRUCTION
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//#define BENCH_TRIVIAL_TYPE
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#ifdef BENCH_TRIVIAL_TYPE
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typedef std::size_t basic_type_t;
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#else
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typedef boost::container::test::copyable_int basic_type_t;
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#endif
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template<typename T>
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T &get_set(std::size_t)
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{
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#ifdef BENCH_SIMPLE_CONSTRUCTION
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T &t = *new T(N);
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for (std::size_t i = 0; i < N; ++i)
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t[i] = basic_type_t(std::rand());
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#else
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T &t = *new T;
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t.reserve(N);
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for (std::size_t i = 0; i < N; ++i)
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t.push_back(basic_type_t(std::rand()));
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#endif
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return t;
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}
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template<typename T>
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T &generate()
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{
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T &v = *new T;
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v.reserve(N);
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for (std::size_t i = 0; i < N; ++i){
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typename T::reference r = get_set<typename T::value_type>(i);
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v.push_back(boost::move(r));
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delete &r;
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}
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return v;
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}
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template<typename T>
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cpu_times time_it()
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{
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cpu_timer sortTime,rotateTime,destructionTime;
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sortTime.stop();rotateTime.stop();destructionTime.stop();
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cpu_timer totalTime, constructTime;
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std::srand (0);
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for(std::size_t i = 0; i< Iter; ++i){
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constructTime.resume();
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{
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T &v = generate<T>();
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constructTime.stop();
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sortTime.resume();
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std::sort(v.begin(), v.end());
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sortTime.stop();
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rotateTime.resume();
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std::rotate(v.begin(), v.begin() + v.size()/2, v.end());
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rotateTime.stop();
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destructionTime.resume();
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delete &v;
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}
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destructionTime.stop();
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}
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totalTime.stop();
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std::cout << " construction took " << boost::timer::format(constructTime.elapsed(), 6, "%ws wall, %ts CPU (%p%)\n");
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std::cout << " sort took " << boost::timer::format(sortTime.elapsed(), 6, "%ws wall, %ts CPU (%p%)\n");
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std::cout << " rotate took " << boost::timer::format(rotateTime.elapsed(), 6, "%ws wall, %ts CPU (%p%)\n");
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std::cout << " destruction took " << boost::timer::format(destructionTime.elapsed(), 6, "%ws wall, %ts CPU (%p%)\n");
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std::cout << " Total time = " << boost::timer::format(totalTime.elapsed(), 6, "%ws wall, %ts CPU (%p%)\n") << std::endl;
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return totalTime.elapsed();
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}
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void compare_times(cpu_times time_numerator, cpu_times time_denominator){
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std::cout
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<< "\n wall = " << ((double)time_numerator.wall/(double)time_denominator.wall)
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<< "\n (user+sys) = " << ((double)(time_numerator.system+time_numerator.user)/(double)(time_denominator.system+time_denominator.user)) << "\n\n";
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}
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int main()
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{
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try {
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std::cout << "N = " << N << " Iter = " << Iter << "\n\n";
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std::cout << "varray benchmark:" << std::endl;
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cpu_times time_varray = time_it<boost::container::varray<boost::container::varray<basic_type_t,N>,N > >();
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std::cout << "boost::container::static_vector benchmark" << std::endl;
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cpu_times time_boost_static_vector = time_it<boost::container::static_vector<boost::container::static_vector<basic_type_t,N>,N > >();
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std::cout << "boost::container::vector benchmark" << std::endl;
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cpu_times time_boost_vector = time_it<boost::container::vector<boost::container::vector<basic_type_t> > >();
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std::cout << "std::vector benchmark" << std::endl;
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cpu_times time_standard_vector = time_it<std::vector<std::vector<basic_type_t> > >();
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std::cout << "varray/boost::container::vector total time comparison:";
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compare_times(time_varray, time_boost_vector);
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std::cout << "varray/boost::container::static_vector total time comparison:";
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compare_times(time_varray, time_boost_static_vector);
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std::cout << "varray/std::vector total time comparison:";
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compare_times(time_varray,time_standard_vector);
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}catch(std::exception &e){
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std::cout << e.what();
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}
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return 0;
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}
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